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vivado [14]
3 years ago
13

Write the ratio as a unit rate 8 meters in 10 seconds

Mathematics
2 answers:
Alja [10]3 years ago
7 0
8:10 All you need to do is add the : in between
34kurt3 years ago
6 0
8/10 divide it by each other which is 0.8 aa the numinator and the denominator is 1 because 1 is a unit
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Marcos had 15 coins in nickels and quarters. He had 3 more quarters than nickels. He wrote a system of equations to represent th
hodyreva [135]

Answer:

There are 6 coins in nickels and 9 coins in quarters.

Step-by-step explanation:

Now, to find the solution.

According to question:

The number of nickels = x.

The number of quarters = y.

So, the total number of coins:

x+y=15.

He had 3 more quarters than nickels.

Thus,

y=x+3 .....(1)

Now, to get the solution:

x+y=15

Substituting the equation (1):

x+(x+3)=15

x+x+3=15

2x+3=15

<em>Subtracting both sides by 3 we get:</em>

<em />2x=12<em />

<em>Dividing both sides by 2 we get:</em>

x=6.

<em>The number of nickels = 6.</em>

Now, substituting the value of x in equation (1):

y=x+3\\\\y=6+3\\\\y=9.

<em>The number of quarters = 9.</em>

Thus, there are 6 coins in nickels and 9 coins in quarters.

6 0
3 years ago
Help would be appreciated. Thanks!
Elena-2011 [213]

Answer:

unknown at the moment....

Step-by-step explanation:

I haven't worked out the answer myself but here are the steps to follow for you to find out the answer.

First step is to find the angle of 'A'. Do this by using the <em>cosine rule</em> on the smaller triangle.

Formula for this is;

cos(A) = <u>b2 + c2 – a2</u>

                             2bc

Second Step is to find the length between AC. Do this by using the <em>Sine Rule</em> on the large triangle as a whole.

Formula for this is;

<u>     a    </u> =  <u>    b      </u> = <u>     c      </u>

Sin(A)        Sin(B)      Sin(C)

Label the large triangle as CA=b and CB=a

This is so you have the length and angles of all parts but the one section in which you're trying to find, this should be the basis of your sine formula but fill in the angle of 'A' which you found before.

<u>  65m    </u> =  <u>    b      </u>

Sin(A)         Sin(68°)

now get 'b' by itself

<u>   65m (Sin(68°))</u>  =  b

        Sin(A)      

Third step. Now that you have the length of b or AC, minus the length 27m to find the length of CD.    

Hope this helps :)

7 0
3 years ago
Please help! Find the value of C such that each expression is a perfect-square trinomial.
crimeas [40]
For ax^2+bx+c
when a=1
take 1/2 of b and square it
that is what c should be ideally

p^2-30p=c
-30/2=-15
(-15)^2=225
c=225
(p-15)^2 is factored form


k^2-5k+c
-5/2
(-5/2)^2=25/4
c=25/4
factored form is (x-5/2)^2
5 0
3 years ago
Which of the following are NOT trigonometric identities? Check all that apply.
storchak [24]

Answer:

We cannot see the image. Would you like additional information on how to insert an image?

3 0
3 years ago
Read 2 more answers
The diagram represents an enlargement of a rectangle by a scale factor of 4,
Lapatulllka [165]

Answer:D 16inches by 8 inches

Step-by-step explanation:

3 0
4 years ago
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